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Seat No
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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER– I & II (NEW) EXAMINATION – WINTER 2019
Subject Code: 3110005
Date: 11/01/2020
Subject Name: Basic Electrical Engineering
Time: 10:30 AM TO 01:00 PM
Total Marks: 70
Instructions:
1
...
2
...
3
...
Marks
Q
...
A 100V,60 Watt bulb is to be operated from a 220V supply
...
03
04
(a)
State Thevenin’s and Norton’s Theorems
...
A single phase R-L-C circuit having resistance of 8Ω, inductance of
80mH and capacitance of 100µF is connected across single phase ac
150 V , 50Hz supply
...
04
07
(a)
(b)
(c)
Q
...
3
(a)
(b)
(c)
Q
...
4
(a)
(b)
(c)
OR
Derive an expression for the voltage across the capacitor during
charging through the resistor at any instant Vc = V(1-e-t/RC)
...
Define the following terms in connection with AC waveforms:1
...
Power Factor
3
...
Draw impedance triangle, Voltage triangle, Power triangle for single
phase R-L series circuit
...
OR
Define the terms:- 1
...
Reactive power 3
...
Derive the EMF equation of single phase transformer
...
Explain working principle of single phase Transformer
...
Explain in detail the construction of an Alternator
...
4
(a)
(b)
Explain working principle of D
...
Motor
...
03
04
1
(c)
Q
...
5
(a)
(b)
(c)
Explain Generation of Rotating Magnetic Field in 3-phase Induction
Motor with diagrams and equations
...
Explain the terms:- 1
...
Coercive Force
...
OR
Compare MCB and ELCB
...
Explain different methods of power factor improvement